diff options
| author | Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com> | 2016-04-11 16:17:23 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-07-27 09:47:28 -0700 |
| commit | 6bd26f4c241933e812a8b93430eb7bd9b551a0ba (patch) | |
| tree | 92e89d94a9463edc6b6faa45cbcc8ded5cdbcc7e /kernel/sysctl_binary.c | |
| parent | 75012a8866ccb096013aab28e548a6456ad49b21 (diff) | |
powerpc/iommu: Remove the dependency on EEH struct in DDW mechanism
commit 8445a87f7092bc8336ea1305be9306f26b846d93 upstream.
Commit 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn")
changed the pci_dn struct by removing its EEH-related members.
As part of this clean-up, DDW mechanism was modified to read the device
configuration address from eeh_dev struct.
As a consequence, now if we disable EEH mechanism on kernel command-line
for example, the DDW mechanism will fail, generating a kernel oops by
dereferencing a NULL pointer (which turns to be the eeh_dev pointer).
This patch just changes the configuration address calculation on DDW
functions to a manual calculation based on pci_dn members instead of
using eeh_dev-based address.
No functional changes were made. This was tested on pSeries, both
in PHyp and qemu guest.
Fixes: 39baadbf36ce ("powerpc/eeh: Remove eeh information from pci_dn")
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sysctl_binary.c')
0 files changed, 0 insertions, 0 deletions